/* Yoctoloop Labs — landing page styles
   Near-black page, warm off-white text, one amber accent. Body: IBM Plex Sans. Labels: JetBrains Mono. */

@font-face {
  font-family: "IBM Plex Sans";
  src: url("assets/fonts/plex-sans-latin.woff2") format("woff2");
  font-weight: 400 600;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("assets/fonts/jetbrains-mono-latin.woff2") format("woff2");
  font-weight: 400 600;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --bg: #0f1112;
  --bg-2: #15181a;
  --ink: #efe9dd;
  --ink-2: #c9c2b4;
  --muted: #8a857a;
  --line: rgba(239, 233, 221, 0.14);
  --accent: #f2a93b;
  --accent-ink: #0f1112;
  --focus: #f2a93b;
  --col: 40rem;
  --gutter: clamp(16px, 5vw, 48px);
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --bg: #f6f3ec;
    --bg-2: #ede8dd;
    --ink: #141516;
    --ink-2: #3a3b3c;
    --muted: #6d6a63;
    --line: rgba(20, 21, 22, 0.14);
    --accent: #b86b00;
    --accent-ink: #f6f3ec;
    --focus: #b86b00;
  }
}
:root[data-theme="light"] {
    color-scheme: light;
    --bg: #f6f3ec;
    --bg-2: #ede8dd;
    --ink: #141516;
    --ink-2: #3a3b3c;
    --muted: #6d6a63;
    --line: rgba(20, 21, 22, 0.14);
    --accent: #b86b00;
    --accent-ink: #f6f3ec;
    --focus: #b86b00;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--accent); text-decoration: none; text-underline-offset: 0.18em; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 2px; }
p { margin: 0 0 1.25rem; }
h1, h2, h3 { margin: 0; font-weight: 500; letter-spacing: -0.015em; line-height: 1.15; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 10;
  background: var(--accent); color: var(--accent-ink); padding: 8px 12px; font-family: var(--mono); font-size: 0.85rem;
}
.skip-link:focus { left: var(--gutter); }

/* Column */
.site-header, main, .site-footer {
  width: 100%;
  max-width: calc(var(--col) + 2 * var(--gutter));
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* Header */
.site-header {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding-top: 28px; padding-bottom: 8px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.mark { width: 22px; height: 22px; color: var(--accent); flex: none; }
.wordmark { font-family: var(--mono); font-weight: 500; font-size: 0.95rem; letter-spacing: 0.02em; }
.site-nav { display: flex; gap: 18px; font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.01em; }
.site-nav a { color: var(--muted); }
.site-nav a:hover { color: var(--ink); text-decoration: none; }

/* Blocks */
main { flex: 1; }
.block { padding: clamp(56px, 10vh, 112px) 0 0; }
.block:last-child { padding-bottom: clamp(64px, 12vh, 128px); }
.eyebrow {
  font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 18px;
}
.hero { padding-top: clamp(72px, 16vh, 160px); }
h1 { font-size: clamp(1.9rem, 5.2vw, 2.75rem); margin-bottom: 1.6rem; }
.accent { color: var(--accent); }
.muted { color: var(--muted); }
h2 { font-size: clamp(1.45rem, 3.4vw, 1.9rem); margin-bottom: 1.2rem; }
h3 { font-size: 1.0625rem; font-weight: 600; margin-bottom: 0.35rem; }
.lede { font-size: 1.2rem; line-height: 1.5; color: var(--ink); }
.block p { color: var(--ink-2); max-width: 36rem; }
.block .lede { color: var(--ink); }

/* Facts */
.facts {
  margin: 2rem 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0;
  border-top: 1px solid var(--line);
}
.facts div { padding: 14px 0; border-bottom: 1px solid var(--line); }
.facts div:nth-child(odd) { padding-right: 18px; }
.facts dt { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.facts dd { margin: 4px 0 0; color: var(--ink); font-size: 0.98rem; }

/* Principles */
.principles { list-style: none; margin: 0; padding: 0; counter-reset: p; }
.principles li { position: relative; padding: 22px 0 10px 3.2rem; border-top: 1px solid var(--line); counter-increment: p; }
.principles li:last-child { border-bottom: 1px solid var(--line); padding-bottom: 20px; }
.principles li::before {
  content: "0" counter(p);
  position: absolute; left: 0; top: 26px;
  font-family: var(--mono); font-size: 0.78rem; color: var(--accent); letter-spacing: 0.04em;
}
.principles p { margin-bottom: 0.5rem; }

/* Close + form */
.close h2 { font-size: clamp(1.7rem, 4.4vw, 2.3rem); }
.status-line { margin-top: 2.2rem; color: var(--ink-2); }
.status-line .eyebrow { display: inline; margin-right: 10px; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding-top: 28px; padding-bottom: 40px;
  font-family: var(--mono); font-size: 0.78rem; color: var(--muted);
}
.foot-links { margin: 0 0 14px; }
.foot-links a { color: var(--muted); }
.foot-links a:hover { color: var(--ink); text-decoration: none; }
.copy { margin: 0; }

@media (max-width: 560px) {
  .site-header { flex-wrap: wrap; }
  .site-nav { gap: 14px; }
  .facts { grid-template-columns: 1fr; }
  .facts div:nth-child(odd) { padding-right: 0; }
  .principles li { padding-left: 2.4rem; }
}

/* Theme toggle */
.theme-toggle { display: inline-flex; align-items: center; gap: 6px; background: none; border: 1px solid var(--line); border-radius: 999px; padding: 3px 10px; font-family: var(--mono); font-size: 0.72rem; color: var(--muted); cursor: pointer; line-height: 1.4; }
.theme-toggle:hover { color: var(--ink); border-color: var(--muted); }